Products
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for All Mechanical Impact Sources And Seismographs |
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Theory of Operation: All Wireless Trigger Box 3 (or WTB 3) units, whether connected to a source or seismograph, must have a valid GPS lock. The Source WTB 3, connected to the source with a hammer switch or other device, senses the time break. The WTB 3 calculates the GPS time of the event, then transmits it to the Recorder WTB 3 units via VHF radio. The Recorder WTB 3 units, the ones connected to the trigger port of each seismograph, receive the trigger time. They add one second to the received event time, and then trigger the seismograph accordingly. These seismographs, which must have a one second pre-trigger time programmed into them, start storing data once they receive the trigger signal from the attached WTB 3. |
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Downloads:
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Download WTB3 Brochure |